﻿<blockquote class="extDef">NOTE&nbsp; Definition according to ISO/CD 10303-42:1992<br>
The associated surface function determines the unique surface which is associated with the pcurve. It is required by the propositions which apply to surface curve and its subtypes.</blockquote>

<blockquote class="note">NOTE&nbsp; Function adapted from <strong>associated_surface</strong> defined in ISO 10303-42.</blockquote>
<blockquote class="history">HISTORY&nbsp; New function in IFC4 Addendum 2</blockquote>